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Solar-powered nodes employed in farmland wireless sensor network have energy advantages but at the same time have the problem of high cost. Wireless sensor network employs both solar-powered nodes and battery powered nodes which can reduce cost and prolong network lifetime. This paper presents an algorithm based on LEACH to study the clustering process of farmland environment monitoring sensor network which contains both solar-powered nodes and battery-powered nodes. This algorithm classifies nodes into three types based on the nodes characteristics first and the nit selects cluster nodes based on the comparison of the number of cluster head nodes and the solar powered nodes. The algo- rithm in this paper gives priority to utilize the solar-powered battery by two elections in one round. Simulation result shows that this algorithm can improve the utilization of solar energy, decrease node death and finally prolong the network lifecycle.

Energy Heterogeneous Wireless Sensor Network Clustering Mechanism in Farmland